Brewing.



MAX ESSIIB' or m re imam- Patented July 20, 1915.

1, 146, 793. Specification hf'IJtters Patent.

No Drawing. Application filed May 7, 1913.

To all whom it may concern:

Be it known that I, Max HESSBERG, a citizen of the German Empire, andresiding at London, England, have invented certain new and usefulImprovements in Brewing, of which the following is a specification.

My invention relates to improvements in and relating to brewing, and aprimary object is to extract the bittering from the residue or dregsfrom the cooler mixed with the spent hops, which residue has hithertobeen regarded as worthless. To this end, I mash the mixture of coolerresidue or dregs and spent hops over again with the succeeding brew. Inthis manner not only is the bittering contained in the spent hopscompletely utilized, but the bittering and hop resins separated out inthe residue or dregs by the precipitation of albumens are againextracted.

My process can be carried out to particular advantage if the raw hopsare ground to a fine powder in a hop mill before being mashed. After theusual boiling, the wort is turned out from the hop copper, without a hopstrainer being used, together with the spent hops, direct onto thecooler. The cooler residue or dregs and spent hops remaining behind inthe press are boiled with the mash in the succeeding brew in the mashcopper and, when this mixture is pumped back to the remaining mash inthe mash-tun, are mixed with the new brew and so thoroughly utilized.

The technical advance effected by the present invention lies in thecomplete utilization not only of the spent hops but also of thebittering contained in the albuminous residue left by the precedingbrew, which has hitherto been lost, so that a saving in hops of about25% of the quantity hitherto employed, or more, is effected, apart fromthe saving of some 20% effected by using a hop mill, which is ofparticular advantage for the present process. Moreover, by employing myprocess I save the wort which remains in the residue and amounts forevery 30 hundredweights of malt grist used to about half a hectoliter.Lastly, the new process possesses a new economic value, for

Serial No. 766,089.

the nutritive value of the grains is considerably increased by theaddition of the albuminous residue from the cooler.

lVhen a hop mill is not used, the cooler residue from the press orstrainers can be used either alone or with the spent hops, as mentionedabove, to be mashed again in the succeeding brew. The utilization of theresidue will, however, not be so complete in this case.

My process can be applied to various systems of brewing, but to make theinvention better understood its mode of application to one particularsystem, viz. the decoction system, will now be explained. As is wellknown, in the so-called decoction system of brewing the malt is first ofall mashed with cold water in the mash-tun, after which hot water isadmitted to the mash-tun from a separate vessel called the mash copper;a portion of the warmed mash is then run off to the mash copper, inwhich it is boiled, after which it is returned to the mash-tun. Thislatter process is repeated two or three times until the mash is raisedto the desired temperature after which the solid particles are allowedto settle and the clear mash is run off into another vessel where it isfurther cleared and passes thence to the beer copper where it is brewedwith the hops. From the beer copper it passes to the cooler where theresidue or dregs are collected.

In applying my invention to the above system I elfect the remashing ofthe cooler residue or dregs either in the mash copper or in the mash-tunor in the vessel containing the clear mash (Lc'iuterbottz'ch) or in thebeer copper. If desired, however, I may boil the cooler residue or dregswith water or with the wort either in an open vessel or under pressurein a closed vessel, and add the same to a succeeding brew.

I claim 1. A process of extracting the bittering and hop resins from thecooler residue or dregs obtained from one brew, consisting in mashingthe said residue or dregs in the succeeding brew.

2. A process of extracting the bittering and hop resins from the coolerresidue or dregs obtained from one brew, consisting in In testimonywhereof, I aflix my signature mashing the said residue or dregs With thein the presence of two Witnesses, at Berlin, I spent Ahops in theisucceeding brefiv. b Germany, this 19th day of April, 1918.

3. process 0 extracting t e ittering and hop resins from the coolerresidue or I MAX HESSBERG' dregs obtained from one brew, consisting inWitnesses: mashing the said residue or dregs in the v WOLDEMAR HAUTT,mash copper during the succeeding brew. HENRY HASPER.

Copies of this patent may be obtained for five cents'each, by addressingthe Commissioner of Patents,

, Washington, D. G.

